Alain Chevallier (6 November 1947 – 3 October 2016) was a French Grand Prix motorcycle designer and builder. During the 1970s and 1980s, Chevallier designed and built road racing motorcycles using Yamaha engines and campaigned them in the Grand Prix world championships. His brother Olivier Chevallier rode the bikes until he was killed while competing at the Grand Prix of Le Castellet in 1980. Chevallier would move up to the premier 500cc class in 1984, building a race bike using Honda's NS500 engine. De Radiguès rode the bike to a ninth place in the world championship.